<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>调用函数</title>
    <script >
        function myFunction(){
            alert("这是的函数111111111");
        }
        function myFunction1(){
            alert("这是的函数222222222222");
        }
    </script>
    <style>
        button{
            width: 100px;
            height: 50px;
            margin: auto;
            position: absolute;
            left: 0;
            right: 0;
            top: 0;
            bottom: 0;
        }
    </style>
</head>
<body>
<button onclick="myFunction(),myFunction1()" id="btn">单击我</button>
</body>
</html>